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Sept. 6, 1932. M. MARSA WINDOW VENTILATOR Filed March 5, 1951 2 lNV ENTOR ATTOR EY end-frames and window sash.

Patented Siept. ti, 1 332 urro STATES:

PATENT OFFICE MELOHOR'MARSA, OF BROOKLYN, NEW YORK, ASSIG-NOR TO WIN 'NA MANUFACTURING CORPORATION, OF YORK, N. Y.

wmnow VENTILATOR Application filed March 3, 1931. Serial No. 519,720.

member, a screen is provided to prevent dirt,

dust and insects from entering thebuilding when the window sash is raised to permit entry of air into the building.

Window ventilators of the type mentioned usually comprise a pair of triangular endframes secured to the vertical members of the window frame immediately above the sill portion thereof so as to project into the room. These end frames have formed thereon a pair of channels in alignment with one another, into which an air deflecting member, usually a heavy pane of glass or a frame carrying one or more panes of glass, is placed so as to rest upon said'sill portion, the upper edge of said deflecting member being spaced from said sash, whereby air is admitted into the room when the lower window sash is raised. A screen frame is hinged or otherwise attached to the structure, it nor mally resting on said end frames. Several diliiculties have been experienced with the constructions of this type. One consists in that the air deflecting member is apt to rattle in windy weather. Another trouble experienced is that the hinged screen frame is apt to swing continuously on its hinges by the action of the wind, and thereby not only permits dust and insects to enter the room but produces a noise by impact against the Still another difiiculty experienced is that, when the screen frame is in its normal protecting position and the window sash is lowered without first swinging the said screen-frame to open.

duce a window ventilator wherein the screenframe serves to prevent rattling of the deflecting member of the structure.

A further object of the invention is to pivot the screen frame to the end-frames of the construction in such a manner that it is detachable from the said end-frames and the deflecting member serves to prevent,,in the operative positions of the elements, disengagement of said screen frame member from said end-frames.

Still a further object of the invention is to so mount the screen frame on the endframes of the ventilator that the said screen frame may be set at any desired angle in relation to the deflecting member.

A further object of the invention is to provide a window ventilator of the character referred to which is simple in construction, efficient in operation, durable in use and capable of manufacture on a commercial scale, or in other words one which is not so diificult to make as to be beyond the reasonable cost of such a contrivance.

With these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter described, pointed out in the appended claims and illus trated in the. accompanying drawing, it being understood that many changes may be made in the size and proportion of the several parts and details of construction within the scope of the appended claims, without departing from the spirit or sacrificing any of the advantages ofthe invention.

One of the many possible embodiments of the invention is illustrated in the accompanying drawing, in which:

Figure 1 is a perspective view showing the improved ventilator positioned on a window; Fig. 2 is a central vertical section taken through the window and the said ventilator, on a larger scale; Fig. 3 is a section taken on line 3-3 of Fig. 2; Fig. 4 is a section taken on line 1- 1 of Fig. 2; and Fig. 5 is a perspective view of the upper portion of one of the end-frames of the improved ventilator.

In the drawing the numeral 10 indicates the lower sash ofa window, slidable in the window casing 11. The ventilator, which is to be secured to said casing, consists of two substantially triangular, preferably, sheet metal end-frames or brackets 12, attached by screws 13, or the like," to the vertical mem bers of the window casing immediately above the sill 14 thereof. Each of these end-frames is substantially in the form of a right-angled triangle, although this is not essential. These frames are so attached to the casing that they permit of free sliding movement of the window sashes, their vertical edges 15 being, for this purpose, spaced from the lower sash. room, that is to say outwardly of the window frame and their slanting edge portions 16 are each provided with two spaced flanges 17, forming a channel 17 Into these channels, which are in alignment, is slid a deflecting member 18 which may be either a glass pane, as shown in the drawing, or a frame holding one or more glass panes. The deflecting member extends across the entire width of the window opening and its purpose is to prevent a direct draft through the window, when the lower window sash is raised, the air being directed by the said deflecting member upwards, as is well known. The construction so far described is old and well knownand has been described herein for purposes of illustration only, the invention, which resides mainly in the mounting of the screen frame being applicable to any window ventilator in which end-frames and a deflecting member are provided.

In order to prevent entrance of dust, insects, etc., into the room through the yentilator, when the window is opened, the top of the ventilator structure is provided with a removable closure, denoted, as a whole, by the numeral 19. This closure includes a frame 20 of any suitable material, such as wood, and is covered with foraminous material, such as a fine meshed wire fabric 21. Each of the end-frames 12 is provided, adjacent its top and in proximity of the outer flange 17 thereof with a horizontal slot 22. Along each longitudinal edge of the slot is provided a ledge 23. The ledges on each end-frame project toward the other end frame of the structure and are shorter than The end frames project into the the slot, they extending from the inner end 2% of the slot toward the outer end 25 thereof but stop short of the latter a distance which corresponds substantially to the diameter of a hinge pin 26 to be engaged with the said ledges. As appears from the drawing, the screen frame comprises an outer longitudinal member 27, and inner longitudinally member 28, which are connected by end members 29. On the outer longitudinal member 27 are mounted two hinge pins 26 in alignment with one another and adapted to be engaged with the slots 22 above described, such engagement being made before the deflecting member 18 is mounted on the end-frames. When then the screen frame is shifted toward the window sash 10 and the hinge pins brought into engagement with the ledges 23, which serve as bearings for the said pins, and the deflecting member is placed into the channels 17 in the end-frames, the said deflecting member prevents disengagement of the screen frame from the ventilator structure. he outer longitudinal member 27 of the screen frame is rounded, as clearly shown in Fig. 2 of the drawing, so as to permit convenient swinging of the screen frame on the end-frames. The inner longitudinal member 28 0f the screen frame carries a packing strip 30 of felt or rubber, which, when the said screen frame is properly positioned on the ventilator, engages against the window sash so as to prevent entry of dust, insects, or the like into the room. The width of the screen frame is such that, when in engagement with the window sash, asshown in Fig. 2 of the drawing, it bears against the deflecting member and thereby prevents rattl ng 0f the latter.

In order to prevent swinging or flapping of the screen frame on its pivot pins by the action of the wind, each of the end members of the said frame carries a spring pressed lug 31, the said lugs being in alignment with each other and adapted to engage corrugations 32 on the inner faces of the end-frames 12, said corrugations being arranged in a vertical row so as to permit of adjustment of the angle at which the screen frame extends in rela ion to deflecting member 18. In any adjusted position, the screen frame is held against flapping by the co-operating spring pressed lugs 31 and corrugations 32.

The operation of this device is as follows: When the device is in position on a window easing, as shown in Figs. 1 to 3, inclusive, of the drawing, the lower window sash may be raised until the lower rail thereof is in abutment with the packing 30 on the screen frame. Air, entering through the window aperture passes into the room through the wire fabric 21 and is directed upwardly, thus avoiding direct draft. The ai is screened and th reby permits thorough ventilation without the accompanying annoyance of dust, dirt and insects. The window sash may be lowered from the position shown in Fig. 2 of the drawing without the necessity of first swinging the screen frame on itspivot pins to disengage the said screen frame from the sash. When lowering the window sash, the screen frame is simply shifted around its hinge pins by the friction between the window sash and the packing 30 until it is disengaged from the window sash. When the sash has been brought to its desired position, the screen frame may be shifted back to proper position. No breakage will result. The lugs 31, being in engagement with the corrugations on the end-frames of the structure, effectively prevent flapping of the said screen frame by the wind, and the screen frame prevents rattling of the deflecting member, as above stated.

In mounting the ventilator construction on a window casing, first the two end frames are put in place. The screen frame is then engaged with the end frames, and, finally, the deflecting member put in position. If it is intended to remove the screen frame for any purpose, obviously the deflecting member must first be disengaged from the end frames of the construction. For this purpose the top edge of the deflecting member is positioned above the screen frame, as clearly shown in Fig. 2 of the drawing.

As standard window casings sometimes vary slightly in width, hinge pins 26 of substantial length are provided. These pins may be driven into the screen frame to an extent to take care of the slight variations in the width of the window casings.

It is obvious that, while herein a specific way of pivoting the screen frame to the endframes of the ventilator has been described and a specific means for preventing flapping of the screen frames in adjusted positions thereof in relation to the deflecting member has been disclosed, any other mechanisms may be provided without departing from the invention, which lies mainly in the provision of a pivoted screen member, which yields when the window sash is raised or lowered which may be conveniently mount-' ed upon and removed from the structure; which maintains the deflecting frame in fixed position against wind pressure; and which may be adjusted in relation to the deflecting frame.

What I claim is s l. The combination with a window casing and a vertically slidable sash therein, of a pair of ventilator endfra1nes secured to the vertical members of said window casing immediately above the sill portion thereof so as to project into the room, said end-frames having formed thereon a pair of channels in alignment with one another, an air-deflecting plate member slidable in said channels and resting upon said sill portion, the top edge of said deflecting member being spaced from said sash, a screen frame pivotally mounted on said end-frames adapted to close the space between the top edge of said deflecting member and said window sash, and co-acting means on said screen frame and said endframes for maintaining said screen frame in closing position, said co-acting means including spring pressed members thereby permitting said screen frame to be shifted around its pivots in either direction by pressure exerted thereon in the act of moving said sash either up or down in said window casing.

2. The combination with a window casing and a vertically slidable sash therein, of a pair of ventilator end-frames secured to the vertical members of said window casing immediately above the sill portion thereof so as to project into the room, said end-frames having formed thereon a pair of channels in alignment with one another, an air-deflecting plate member slidable in said channels and resting upon said sill portion, the top edge of said deflecting member being spaced from said sash, a screen frame pivotally mounted on said end frames adapted to close the space between the top edge of said deflecting member and said window sash, and co-acting lugs and stops on said window screen and said endframes for maintaining said screen frame in closing position, said lugs being springpressed to permit disengagement thereof from said stops and thus allow of swinging of said screen frame around its pivotal connection with said end frames by the act of moving said sash up or down in said window casin 3. The combination with a window casing and a vertically slidable sash therein, of a pair of ventilator end-frames secured to the vertical members of said window casings immediately above the sill portion thereof so as to project into the room, said end-frames having formed thereon a pair of channels in alignment with one another, anair deflecting plate member slidable in said channels resting upon said sill port-ion, the top edge of said deflecting member being spaced from said sash, a screen frame adapted to close the space between the top edge of said deflecting member and said window sash, two pivot pins projecting from the ends of said screen frame in alignment with one another, a. pair of horizontally extending spaced ledges on each end-frame adjacent the top of the latter and spaced from the channel therein a distance that is somewhat greater than the diameter of one of said pivot pins, whereby said pivot pins are adapted to be inserted between said ledges before said deflecting member is slid into said channels, said screen frame abutting against said deflecting member, whereby thelatter prevents disengagement of said pivot pins from said ledges, and coacting means on said screen frame and said end-frames for maintaining said screen frame in closing position.

4. The combination with a window casing and a vertically slidable sash therein, of a pair of ventilator end-frames secured to the vertical members of said window casing immediately above the sill portion thereof so as to project into the room, said endframes having for ned thereon a pair of channels in alignment with one another, an air-deflecting plate member siidable in said channels and resting upon said sill portion, the top edge of said deflecting member being spaced from said sash, a screen frame pivotally mounted on said end-frames adapted to close the space between the top edge of said deflecting member and said window sash, and coacting means on said screen frame and said end-frame for maintaining said screen frame in closing position, said screen frame in closing position bearing against the inner face of said air deflecting member and thereby preventing rattling of the latter. 7

5. The combination with a window casing and a vertically slidable sash therein, of a pair of ventilator end-fr mes secured to the vertical members of said window casing immediately'above the sill portion there of so as to project into the room, said endframes having formed thereon a pair of channels in alignment with one another, an air-deflecting plate member slidable in said channels and resting upon said sill port-ion, the top edge of said deflecting member being spaced from said sash, a screen frame pivotally mounted on said end frames adapted to close the space between the top edge of said deflecting member and said window sash, and co-acting lugs and stops on said window screen and said end-frames for maintaining said screen frame in closing position, he stops co-operating with each of said lugs being arranged in a vertical row to permit angular adjustment of said screen frame in relation to said deflecting member.

6. The combination with a window casing and a vertical slidable sash therein, of a pair of ventilator end-frames secured to the vertical members of said window casing immediately above the sill portion thereof so as to project into the room, said end-frames having formed thereon a pair of channels in alignment with one another, an air-deflecting plate member slidable in said channels and resting upon said sill portion, the top edge of said deflecting member being spaced from said sash, a screen frame pivotally' mounted on said end frames adapted to close the space between the top edge of said deflecting member and said window sash, and co-acting lugs and stops on said window screen and said end-frames for maintaining said screen frame in closing'position, the stops co-operating with each of said lugs being-arranged in a vertical row to permit angular adjustment of said screen frame in relation to said deflecting member, and said lugs being spring-pressed to permit disengagement thereof from said stops and thus 

